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The action and mechanism of copolymer of maleic acid and acrylic acid (PMAA) in flotation separation of barite and fluorite in the presence of collector of sodium oleate were studied. A single mineral flotation test shows that sodium oleate has a good collecting for barite and fluorite, and PMAA has an obvious selective depressing effect on fluorite. A flotation test of artificially mixed minerals confirms that PMAA can achieve the separation of barite from fluorite in the presence of sodium oleate. A Zeta potential test shows that PMAA can hinder the adsorption of sodium oleate on the surface of fluorite, but cannot hinder its adsorption on barite surface. An XPS analysis shows that PMAA isn't effectively adsorbed on the surface of barite, but is chemically adsorbed on the surface of fluorite through the interaction between carboxyl groups of PMAA and calcium ions of fluorite, thus achieving the selective depression of fluorite during the flotation of barite with sodium oleate.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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